package com.estore.model;
import java.util.Objects;
import java.util.Set;
import java.util.HashSet;

/**
 * 商品实体类
 */
//public class Product implements Comparable<Product>{
public class Product {

    private String id;      // 商品ID
    private String name;    // 商品名称
    private double price;   // 价格
    private int stock;      // 库存
    private Set<String> tags; // 商品标签

    // 修改后的构造函数 - 接收标签集合
    public Product(String id, String name, double price, int stock, Set<String> tags) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.stock = stock;
        this.tags = tags != null ? tags : new HashSet<>();
    }

    // 重载构造函数 - 如果不传入标签，初始化为空的HashSet
    public Product(String id, String name, double price, int stock) {
        this(id, name, price, stock, new HashSet<>());
    }

    // Getters and Setters ...
    public String getId() { return id; }
    public void setId(String id) { this.id = id; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public double getPrice() { return price; }
    public void setPrice(double price) { this.price = price; }
    public int getStock() { return stock; }
    public void setStock(int stock) { this.stock = stock; }

    // tags属性的getter和setter方法
    public Set<String> getTags() {
        return tags;
    }

    public void setTags(Set<String> tags) {
        this.tags = tags != null ? tags : new HashSet<>();
    }

    @Override
    public String toString() {
        String baseInfo = String.format("ID: %-5s | 名称: %-20s | 价格: ¥%-8.2f | 库存: %d",
                id, name, price, stock);

        // 如果有标签，则在末尾显示标签信息
        if (tags != null && !tags.isEmpty()) {
            return baseInfo + " | 标签：" + tags;
        } else {
            return baseInfo;
        }
    }

    // 重写 equals 和 hashCode 是一个好习惯，特别是当对象要放入Set或作为Map的key时
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Product product = (Product) o;
        return Objects.equals(id, product.id);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id);
    }

//    @Override
//    public int compareTo(Product other) {
//        return this.id.compareTo(other.id);
//    }
}